Malicious PDF — malware analysis report

Static analysis result for SHA-256 d568a49a67e0efae…

MALICIOUS

PDF

79.5 KB Created: 2021-09-08 12:27:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e0524c8798b0e4ff15451d1021b5d7b0 SHA-1: 4863db253c8535cee6a370e234bb5d09a202140c SHA-256: d568a49a67e0efae54b380b20d2bbf6b38bb4cfb74422da1a0f06d73b011708e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs pointing to a link farm hosted on disposable domains, a common tactic for phishing or distributing further malware. ClamAV detection and ML classification confirm its malicious nature. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates the intent to use a large number of links on potentially untrusted hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6906

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dortmundpools.com/contents/files/21242167321.pdf In PDF document text
    • http://hoaphathotel.com/luutru/files/kapozu.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/tixepuxamojezusezix.pdfIn PDF document text
    • http://radioevangilereal.com/assets/ckfinder/core/connector/php/uploads/files/bomegibuvumutofugudetod.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/5dd29c566745d7a7c712c22ac0dd00ca/fegogopuvakiduxe.pdfIn PDF document text
    • http://gamecoast.by/uploads/files/71731970713.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/21978837207.pdfIn PDF document text
    • http://stimatacasa.eu/userfiles/files/47732441353.pdfIn PDF document text
    • http://kangmeideyiliao.com/uploadfile/file///2021090220301559.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/89726273790.pdfIn PDF document text
    • http://duhochoangthanh.com/upload/files/11277645810.pdfIn PDF document text
    • http://nutranghongngoc.com/media/ftp/file/tabuvexazopal.pdfIn PDF document text
    • https://www.oalysa.cz/ckfinder/userfiles/files/85653945357.pdfIn PDF document text
    • http://anshan56.cn/userfiles/file/16310828242008635255.pdfIn PDF document text
    • https://bartonsteel.com/tony/barton/ckfinder/userfiles/files/18725761524.pdfIn PDF document text
    • http://27derajat.com/assets/ckfinder/core/connector/php/uploads/files/56536088806.pdfIn PDF document text
    • http://ccshecea.org/upload/files/69507844249.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/41540229225.pdfIn PDF document text
    • https://tumujerrusa.com/userfiles/56297480312.pdfIn PDF document text
    • https://luminex.pl/upload/file/62998076590.pdfIn PDF document text
    • https://jmtours.co/aym_image/files/jixewimogiluronu.pdfIn PDF document text
    • https://jeevadhara.org/work/london/userfiles/file/farodozubowaro.pdfIn PDF document text
    • http://erimti.com/userfiles/file/9656391809.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=livros+sobre+viagem+astral+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EE 21028 bytes
SHA-256: 99b53b25a1986d4f06b97c2bbcab657e1b26362ddbc341fb0c26457b0bee4096
font_01_sfnt_off00010f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F60 10900 bytes
SHA-256: 34aaefe5c76fd45cccafda831a4520165cfcedf8c4c40056e4da595a105071e9
font_02_sfnt_off00012843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12843 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1